[PATCH v2 1/2] dt-bindings: Add docs for EL15203000

[Oleh Kravchenko <oleg@kaa.org.ua>]

Add documentation and example for dt-bindings EL15203000.
LED board (aka RED LED board) from Crane Merchandising Systems.

Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua>
---
 .../bindings/leds/leds-el15203000.txt         | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/leds-el15203000.txt

diff --git a/Documentation/devicetree/bindings/leds/leds-el15203000.txt b/Documentation/devicetree/bindings/leds/leds-el15203000.txt
new file mode 100644
index 000000000000..457fd8d7226f
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-el15203000.txt
@@ -0,0 +1,53 @@
+Crane Merchandising System - el15203000 LED driver
+--------------------------------------------------
+
+This LED Board (aka RED LEDs board) is widely used in coffee vending machines
+produced by Crane Merchandising Systems.
+
+Required properties:
+- compatible : "crane,el15203000"
+- reg :
+	see Documentation/devicetree/bindings/spi/spi-bus.txt
+- spi-max-frequency : (optional)
+	see Documentation/devicetree/bindings/spi/spi-bus.txt
+
+LED sub-node properties:
+- label :
+	see Documentation/devicetree/bindings/leds/common.txt
+- linux,default-trigger : (optional)
+	see Documentation/devicetree/bindings/leds/common.txt
+- max-brightness : (optional)
+	Specify here 2 if LED has special effect. Effects by LED type:
+	- Pipe has leaking
+	- Screen Frame has blinking
+
+Example
+-------
+
+led-controller@0 {
+	compatible = "crane,el15203000";
+	reg = <0>;
+	spi-max-frequency = <50000>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	/* water pipe */
+	pipe@50 {
+		reg = <0x50>;
+		label = "red:pipe";
+		max-brightness = <2>;
+	};
+
+	/* screen frame */
+	screen@53 {
+		reg = <0x53>;
+		label = "red:screen";
+		max-brightness = <2>;
+	};
+
+	/* vending area */
+	vend@56 {
+		reg = <0x56>;
+		label = "red:vend";
+	};
+};
-- 
2.21.0